Feeding mechanism



Feb. 26, 1929. Y1,703,342

E. G.` GARTIN FEEDING MEGHANI SM Filed Dec. 23. 1920 Feb. 26, 1929. 1,703,842

E. G. GARTIN FEEDING MECHANI SM Filed Dec. 2:5. 1920 -2 sheets-sheer 2 11T/bg. 5.

Patented Feb. 26, 1929.

UNITED STATES PATENT OFFICE.

ninna e. GARTIN, or cLAHEMoNT, NEW HAMPSHIRE, AssIGNoB. To SULLIVAN izIacHINiiaYL comm, A CORPORATION or MASSACHUSETTS.

Y Application Myinvention relates to feeding mechanisnis and more especially to feeding mechanisms for use in connection with rock drilling machinery.

An object of my invention is to provide an improved feeding mechanism. Another object of my'invent'ion is to provide an improved feeding mechanism of the fluid pressure type. A further object of my invention is to provide an improved feeding mechanism of the liquid pressure type comprising means .for producing by means of a compact mechanism a liquid pressure and applying it to the production of movement of my feeding device. A stil. further object of my invention is to provide an improved rotating and drill feeding mechanism. Other objects ofA my invention will appear in the course of the following specification.

In the accompanying drawings I have shown for purposes of illustration one embodiment which my invention may assume in practice.

In these drawings,-

Fig. 1 is av central longitudinal section through the feed cylinder and the rear end of the percussive cylinder of a stoping drill provided with my improved mechanism.

Fig. 2 is a. central section, on a plane at right angies to the plane of Fig. 1, through the cylinder of a percussive motor embodying my improved rotatingl and feeding mechanism.

Fig. 3 is a transverse section on the line of Fig. 1.

Fig. 4'is a similar section .on the line 4 4 of Fig. 1.

5 is a diagrammatic view showing the circulation of the liquid under pressure to and through niyvimproved feeding mechanism.

In the illustrative embodiment of my invention I have shown the same used in connection with a stoping drill generally indicated by the numeral 1 and comprising a fluid pressure percussive motor 2, a feeding mechanism proper an auxiliary motor 4 designed to effect rotation of the drill'steel and to produce power for the production of a liquid pressure, and a liquid pressure generator 5 driven by the motor 4.

The percussive motor 2 is of a well-known type and comprises a cylinder 6 in which is reciprocable a piston 7 under the action of live fluid distributed in a well-known manner to the opposite ends of the cylinder 6, said piston 7 being provided with a Striking nose 8 adaptled December 28, 1920. Serial No. 432,761.

ed to cooperate with the rear end of a drill steel 9 carried in a chuck 10 rotatably mounted in the front end of a cylinder head 11, which latter is secured to the cylinder member 6 by means of side rods 12. Rigidly secured within the casing of the pump 5 and vand accordingly the drill steel 9, I have provided at the rear end of the cylinder 6 a. rotary motor generally designated 4 and coinprising a series of three rotors designated respectively 13, 14, and 15, these rotors being mounted in a suitable housing 16 in which are formed intersecting chambers 17, 18 and 19 in which the rotors 13, 14 and 15 are Iespectively housed, it being understood that the rotors are provided about their peripher ies with intermeshing teeth 20 and that fluid pressure is supplied adjacent the mesh line of said teeth in such manner as to cause rotation of said rotors. The rotor 14 is located between the rotors 13 and 15, and fluid pressure is admitted at diametrically o posite points by means of passages 21 and) 22 to points adjacent the mesh line between 'the rotors 13, 14, and 14 and 15. Fluid is conducted away from .the opposite sides of the mesh lines of these rotors by passages 23 and 24.

Fluid supply to the passages 21 and 22 is controlled by the Valve mechanism generally indicated by 25 which likewise controls a supply of fluid pressure to the percussive motor 2. The several rotors are mounted in a suitable manner, the central rotor 14 being mounted on a stub shaft arranged coaxially with the iston 7 and journaled in opposite sides of t e housing 16 and extending through a pump chamber 26 and carrying in said pump chamber one rotor 27 of an intermeshing pair of rotors constituting an oil pump, the other of these rotors being designated 28 and mounted in meshing relation with rotorV 27. The rotor 15 is journaled on one of the sidev rods 12, as is also the rotor 28, and the rotor 13 vis journaled on the other side rod and provided upon its forward end with la sleeve member 29 extending forward in parallelim with the drill cylinder through a. assageway 30 and clutched at its forward e as at 31pm a similar tubular sleeve 32, which carries at its forward. end'a spur gear 33 meshing with the spur gear 34 formed on the periphery or the chuck member l0. It will thus beobvious that as fluid pressure is supplied to the rotors `of the motor 4 the'motorV will simultaneously supply power 4for'the rotation ofthe drill steel, which power is transmitted .thereto -by way of the tubular shafts 29 and 32 and the intermeshing spur gears 33 and 34 (although it will be clear that further gear reduction may be used) and also will drive the oil pump e 5 and thereby produce a suitable source ofliquid pressure for feeding the drill steel to the work. It will be kunderstood that the Vteeth on therotors 27 and 28 constituting the oil pump are narrower' and of less height than the teeth on the rotors of the motor 4 whereby a surplus of power is provided kby the fluidvpressure motor 4 for use in rotating the drill steel. Y

lIhe oil pumping system operated by the pump 5 comprises a storage chamber 350cmmunicating with a suitable oil supply 43b Vclosedfnormally by a plug 37 and adapted to supply oil by way of a passage 38 to av point adjacent the mesh line of the rotors 2Tand 28 and oil is pumped by saidV rotors by way of a passage 39 to the ends of the feeding i mechanism.v To prevent building up of an as oilk is supplied to the front end of the cyl-V inder 44 it will act upon a piston 45 disposed therein and force the cylinder in a forward direction and that oill supplied'through the --line 43 to the rear end of the cylinder willv cause movement of the cylinder' in an opposite direction with respect to the piston. It will be understood that suitable meansV are provided for conducting oil from one end of' the cylinder while it is being supplied to the otherand this is accomplished by arranging a discharge port 46 at a point diametrically opposite the port 39 and the formation, in a valve 47 located in the valve chamber 4l, of oppositely disposed. passages 48 and 449.

Y Thesepassages so cooperate with theA ports 42 and 43 that while the port 39 is connected for example by'w'ay of passage 48- to the passage 43 for the supply. of liquid pressure to the Vfront end ofthe feed cylinder, the

assage 42 leading from the rear end of the eed cylinder is connected by wayV of ythe groove 49 to the discharge passage 46- and hence by way of the chamber 35 tothe suction side ofthe pump.y It will be understood that the maximum pressure obtainable by this pumping means may readily be adjustedlby mosaic varying the tension of aspringO controlling the check valve 51 in the by-pass 4()V by any suitable means not shown. It Will also be understood that during normal forward feed the oil is supplied to the front end of the cylinderv at such ay rate Vas to maintain the steel, when'the percussive motor is idle, a

vdistancefrom the rock slightly greater than the penetration when the steel is hammered. It will be further understood that by limitingthe rate at which liquid is supplied to either end of the cylinder, it will be possible to control the rate Yof movement of the piston and that when moving the steel up to the Work or retracting it a rapid feed is possible. It is also obvious that as the resistance encountered rby the drill steel varies the speed of the motor 4 and consequently the speed of t-he pump 5 varies, thus causing a resultant variation in the feeding pressure. i

.While I have in this application specifically describedone form which my invention may assume in practice, itV will be understood that this form of the sameis shown for purposes of illustrationv and that the invention may be modified and embodied in other forms without depart-ing from its spirit or the scope kof the appended claims.

I/V hat I claim as new and desire to secure by Letters Patent is: Y i

14A drilling mechanism comprising a drilling motor, a drill steel receiving chuck carried thereby, a motor carried by and movable with said drilling motor during feeding for'rotating said chuck relative to said drilling motor, and feeding'means constituting a support for said motor and inl tor of the hammer type, a motor for rotating a drill steel about its axis, and fiuid'actuated feeding means: for the steel constituting a support for said motor and including a pressure generating pump, said pump being driven by said rotation motor and responsive to the load changes onl the lattenv A 4. In a rock drilling mechanism, a tool receiving chuck, rotatable means for transmitting Y'rotation to said chuck, rotatable means for feeding said chuck, a multi-rotor motor, and shafts driven by different rotors of said motor driving said first and second mentioned means.

- 5. In a rock drilling mechanism, a. drilling motor comprising a cylinder member having front and back heads, side rods for securing said heads to said cylinder, a tool rotation motor airried Within said back head, and feeding means including a pump, said second mentioned motor and said pump each having component elements rotatable on said side rods.

6. A drilling mechanism comprising a drilling motor having a tool receiving chuck, fluid pressure operated means for feeding said chuck and motor simultaneously, a head carried by said motor, and means including a motor disposed within said head for rotating said chuck and actuating said feeding mechanism.

7. A drilling mechanism comprising -a drilling motor having a tool receiving chuck, fluid operated means for feeding said chuck and motor simultaneously, a head carried by said motor, means including a motor disposed Within said head for rotating said chuck and actuating s ifl feeding mechanism, said head having luio. chamber, and means whereby fluid therein can have communication with said means c ied by said head during feeding.

8. In a drilling mechanism, a drill steel, means for rotating theV steel, cylinder and piston elements adapted to be relatively moved bv pressure fluid to feed said steel, and means operative when the drilling mechanism is held against rotation for automatically controlling the pressure in said cylinder element accordance with the resistance to drill steel rotation.

9. In a drilling mechanism, a drill steel, means for rotating the steel, pressure fluid actuated feding means for the steel. and means operative When the drilling mechanism is held against rotation for automaticallv controlling the pressure in said feeding means in accordance with the resistance to drill steel rotation.

10. In a drilling mechanism, the combination of drill steel, means for rotating the drill steel. pressure fluid actuated feeding means Jfor the steel, means having fixed relation with the mechanism adapted to prevent rotation of the latter about the axis of the steel, and means responsive to the load changes on said rotation means for automaticallv controlling the pressure in said feedinglmeans.

11. In a drilling mechanism, the combination of a rotary drill steel rotating motor, pressure fluid actuated feeding means for the steel. and means responsive to the torque of said rotary motor when the drilling mechanism is held against rotation for automatically controlling the pressure in said feeding ine-.

l2. In a drilling mechanism, a drilling mo` tor. a drill steel actuated thereby. means for rotating the drill steel, pressure fluid actuated Afeedin means for the steel, means haring rigid xed relation with said motor adapted to prevent rotation of the latter about the axis of the steel, and means Where- 13. In a drilling mechanism, a drilling mo-` tor having a drill steel receivinor chuck, a motor for rotating thefchuck, uid actuated feeding means for the steel, means having rigid fixed relation with said motor adapted to prevent rotation of the latter aboutthe axis of the steel, and means whereby said feeding means is controlled automatically in accordance Withresistance to drill steel rotation operative to control the pressure transmitted by said feeding means in accordance with the requirements of the Work.

14. In a drilling mechanism, the combination of a drill steel, means for rotating the drill steel, means for feeding the steel. means having rigid lixed relation with the mechanism adapted to prevent rotation of the latter, and means whereby said feeding means is controlled automatically in accordance with resistance to drill steel rotation yoperative to control the pressure transmitted by said feeding means in accordance with the. requirements of the Work.

15. In a drilling mechanism, a drilling mo'- tor of the hammer type, drill steel rotation means. means for feeding the steel, and means whereby said feeding means is automatically controlled in accordance with the rcsistance to drill steel rotation. including a plurality ofdependent-ly operable pressure fluid actuated means and operative to control the pressure y transmit-ted by said feeding means in accordance with the requirements of the Work.

16. A drilling mechanism comprising a cylinder, heads therefor, a tool receiving chuck carried by the front head, side rods for connecting said heads and cylinder, and means associated with the rear head for rotating said chuck including an independent rotary motor havinga rotary'motor `element associated with one of said side rods.

17. A drilling mechanism comprising a motor having a plurality of parts, side rods for connecting'the same, a tool receiving chuck, means for rotating said chuck including a motor element disposed on one of said side rods, and a second element cooperating therewith and disposed coaxially with said drilling motor at the rear end thereof.

18. In a rock drill, a drilling motor comprising a cylinder, front and rear heads therefor, and a. piston reciprocable in said cylinder, a. casing at the rear end of said ing an independent plural-rotor motor havcylinder and having intersecting rotor chainf bers and secured to said rear head, a rear head member closing the bores of said casing, a

' drillsteel rotation motor comprising inter- Vtransmission means including a longitudi-V meshing toothed rotors disposed in the bores in said casing, said motor having a large central rotoi disposed coaXially with said piston and cooperating smaller rotors disposed on parallel axes at opposite sides thereof, a drill steel receiving chucl; rotatably mounted in said iront head, and transmission means including means connecting one ot said smaller rotors and said chuck 'for transmitting rotary motion to the latter and said steel.

, 19. In a rock drill, a drilling motor coniprising a cylinder, front and rear heads, and al piston reciprocable in said cylinder, a motor. casing at the rear end ot said cylinder and secured to said rear head and having parallelv prising a cylinder, front and rear heads therefor, a piston reciliirocable in said cylinder, a motor casing, a. rear head member therefor, side bolts for holding said cylinder,

rear cylinder head, motor casing, and rear head member in assembled relation, a drill Vsteel rotation motor comprising a: large toothed rotor disposed coaXially with said piston and cooperating' smaller toothed rotors disposed on parallel axes at each side of saidvlaige rotor, a drill steel receiving chuck rotatably mounted in said liront head, and

nally disposed transmission element rotating on a lixed anis laterally offset from the axis of said large rotor and connecting one of said smaller rotors and said chuck for transmit.

' ting rotary motion to the latter yand the steel.

21. Ina rock drill, a drilling motor comprising a cylinder, front and rear heads therefor, a. piston reciprocable in said cylinder, a

lmotor casing, rear head member therefor,

side bolts for holding said cylinder, rear aylinder head, motor casing, 'and rear head mem ber in assembled relation, a drill steel rotation motor comprising a large toothed rotor 'disposed coazrially With said Vpiston and cooperating smaller toothed rotors disposed on parallel aires at eachV side of said large rotor and journaled on said side bolts, a drill steel receiving chuck rotatably mounted in'said front head, and transmission means includ ing 'longitudinally disposed transmission element journaled in said iront and rear cylinder heads and in said cylinder and connecting one oi said smaller rotors and said chuck tor transmitting rotary motion to the latter and the steel. Y l Y 22. In a rock drill, a tluid actuated drilling motor comprising a cylinder, iront and rear heads therefor, and a piston reciprocable in said cylinder, a motor casing secured to said rear head, a rear head member tor said motor casing, a iiuid actuated drill steel rotation motor disposed in said casing comprising a large toothed central rotor disposed coaxially with said piston and journaled in said rear cylinder head, and cooperating smallerside rotors meshing therewith, a drill steel receiving chuck rotatably mounted in saidy front cylinder head, 'transmission means inclu-ding a. loi jtudinally disposed transmission element journaled at its ends in said iront and cylinder headsand connecting one ot said side rotors and said chuck for transmitting rotary motion to the latter and the steel, and means comprising a. single valvev tor controlling the flow of fluid to both said drilling motor and said rotation motor.

23. In a drilling mechanism,a drilling motor comprising a cylinder and a piston reciprocable therein, a drill steel receiving chuclr rotatably mounted Within the forward end oi said motor, a drill steel rotation motor supported and disposed entirely at the rear end ot said drilling motor and including a large `spur toot-hed rotor disposed coaxially With said piston, and cooperating smaller spur toothed side rotors rotatable on parallel longitudinally extending axes, and transmission means, including a longitudinally disposed element, connecting one of said smaller side rotors and said chuck for transmitting rotary motion to the latter and the steel.

In testimony whereof I adn: my signature.

nLiiiiR e. daarin. 

